"Who's going to be providing the service next year, who do they turn to, and who do they need to enrol with?" he said.

"This is really one of the big issues that the Government hasn't been able to answer as yet.

"Simply telling parents that they'll have information by the end of this year doesn't provide much reassurance when parents are already having to enrol by the end of this week for preschool services in 2015."

He wants the Government to continue the early intervention for at least another 12 months, and says the latest timeframe is unrealistic.

"Currently the ACT Government is one of the major service providers in ACT, if they are going to withdraw from that role as a service provider we need to ensure that there are other players, non-government or private providers, that are able to come in behind government to pick up these services," Mr Wall said.

"To make sure that there isn't a gap that people may fall through where services that are currently offered by Government are no longer able to be provided."

The ACT Government says it is still waiting for the Federal Government to sign off on the details of how the NDIS will operate in the territory.

You have no doubt been hearing a lot about the Paris Agreement and know that it pertains to climate change, but are too embarrassed at this stage to ask for an overall explanation of what it's all about.